Amprobe 38XR-A Manuel utilisateur

User Manual

ENG FRE

SPA

38XR-A

Professional

Digital

Multimeter

38XR-A

Professional Digital

Multimeter

User Manual

5/2018, 6010932 C

English

Limited Warranty and Limitation of Liability

Your Amprobe product will be free from defects in material and

workmanship for one year from the date of purchase unless

local laws require otherwise. This warranty does not cover fuses,

disposable batteries or damage from accident, neglect, misuse,

alteration, contamination, or abnormal conditions of operation or

handling. Resellers are not authorized to extend any other warranty

on the behalf of Amprobe. To obtain service during the warranty

period, return the product with proof of purchase to an authorized

Amprobe Service Center or to an Amprobe dealer or distributor.

See Repair Section for details. THIS WARRANTY IS YOUR ONLY

REMEDY. ALL OTHER WARRANTIES - WHETHER EXPRESS, IMPLIED

OR STATUTORY - INCLUDING IMPLIED WARRANTIES OF FITNESS

FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, ARE HEREBY

DISCLAIMED. MANUFACTURER SHALL NOT BE LIABLE FOR ANY

SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR

LOSSES, ARISING FROM ANY CAUSE OR THEORY. Since some states

or countries do not allow the exclusion or limitation of an implied

warranty or of incidental or consequential damages, this limitation

of liability may not apply to you.

Repair

All Amprobe returned for warranty or non-warranty repair or

for calibration should be accompanied by the following: your

name, company’s name, address, telephone number, and proof of

purchase. Additionally, please include a brief description of the

problem or the service requested and include the test leads with

the meter. Non-warranty repair or replacement charges should be

remitted in the form of a check, a money order, credit card with

expiration date, or a purchase order made payable to Amprobe.

In-Warranty Repairs and Replacement – All Countries

Please read the warranty statement and check your battery before

requesting repair. During the warranty period, any defective

test tool can be returned to your Amprobe distributor for an

exchange for the same or like product. Please check the “Where

to Buy” section on amprobe.com for a list of distributors near you.

Additionally, in the United States and Canada, in-warranty repair

and replacement units can also be sent to an Amprobe Service

Center (see address below).

Non-warranty Repairs and Replacement – United States and Canada

Non-warranty repairs in the United States and Canada should be

sent to an Amprobe Service Center. Call Amprobe or inquire at

your point of purchase for current repair and replacement rates.

USA: Canada:

Amprobe Amprobe

Everett, WA 98203 Mississauga, ON L4Z 1X9

Tel: 877-AMPROBE (267-7623) Tel: 905-890-7600

Non-Warranty Repairs and Replacement – Europe

European non-warranty units can be replaced by your Beha-Amprobe

distributor for a nominal charge. Please check the “Where to Buy”

section on beha-amprobe.com for a list of distributors near you.

Beha-Amprobe

Division and reg. trademark of Fluke Corp. (USA)

Germany

* United Kingdom

In den Engematten 14 52 Hurricane Way

79286 Glottertal Norwich, Norfolk

Germany NR6 6JB United Kingdom

Phone: +49 (0) 7684 8009 - 0 Phone: +44 (0) 1603 25 6662

beha-amprobe.de beha-amprobe.com

The Netherlands - Headquarters

**

Science Park Eindhoven 5110

5692 EC Son

The Netherlands

Phone: +31 (0) 40 267 51 00

beha-amprobe.com

*(Correspondence only – no repair or replacement available from this address.

European customers please contact your distributor.)

**single contact address in EEA Fluke Europe BV

38XR-A Professional Digital Multimeter

1

Display

2

Feature Buttons

3

Function/Range Switch

4

Test Lead Connections

5

Strap Clip

6

Battery/Fuse Cover

38XR-A

MADE IN TAIWAN

PATENTS PENDING

www.amprobe.com

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2

3

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38XR-A Professional Digital Multimeter

CONTENTS

SYMBOLS ...................................................................... 2

SAFETY INFORMATION ................................................ 2

UNPACKING AND INSPECTION ....................................3

INTRODUCTION ............................................................4

MAKING MEASUREMENTS ..........................................4

ADDITIONAL FEATURES ............................................... 16

PRODUCT MAINTENANCE ............................................21

SPECIFICATIONS ............................................................ 22

SAFETY ..........................................................................23

ELECTRICAL SPECIFICATIONS ....................................... 24

2

SYMBOLS



Battery



Double insulated



Direct Current



Alternating Current



Fuse



Complies with EU Directives



Refer to the Manual



Dangerous Voltage



Earth Ground



Audible tone

C

L

A

S

I

F

I

E

D

Underwriters Laboratories, Inc.

CAT III

MEASUREMENT CAT III is applicable to test and

measuring circuits connected to the distribution

part of the building’s low-voltage mains installation.

CAT IV

MEASUREMENT CAT IV is applicable to test and

measuring circuits connected at the source of

the building’s low-voltage mains installation.

SAFETY INFORMATION

 Warning

Do not alter the Product and use only as specified, or the

protection supplied by the Product can be compromised.

• The 38XR-A Digital Multimeter is for use with fixed

equipment installations, such as, distribution panels,

feeders and short branch circuits and lighting

systems in large buildings; and for the primary supply

level, such as, an electric meter or an overhead or

underground utility service.

3

• Do not exceed the maximum overload limits per

function (see specifications) nor the limits marked on the

instrument itself. Never apply more than 1000V dc/750 V

ac rms between the test lead and earth ground.

• Inspect the DMM, test leads and accessories before

every use. Do not use any damaged part.

• Never ground yourself when taking measurements. Do

not touch exposed circuit elements or test probe tips.

• Do not operate the instrument in an explosive

atmosphere.

• Exercise extreme caution when: measuring voltage

>20V // current >10mA // AC power line with

inductive loads // AC power line during electrical

storms // current, when the fuse blows in a circuit

with open circuit voltage >1000 V // servicing CRT

equipment.

• Always measure current in series with the load –

NEVER ACROSS a voltage source. Check fuse first.

Never replace a fuse with one of a different rating.

• Remove test leads before opening the Battery Cover

or case.

UNPACKING AND INSPECTION

Your shipping carton should include:

1 38XR-A Digital Multimeter

1 Test leads w/ alligator clips

1 Magne-Grip® Holster

1 Clip, magnet, and strap

1 Temperature Adapter

1 K-type thermocouple

1 Users Manual

1 9 V battery (installed)

1 mA fuse, 0.5A/1000 V

4

INTRODUCTION

The 38XR-A is a true rms autoranging handheld digital

multimeter for measuring or testing the following:

• DC and AC Voltage

• DC and AC Current

• Resistance

• Frequency

• Dutycycle

• Temperature

• Capacitance

• Diodes

• Continuity

• dBm

• 4 - 20 mA Loop Current

Additional features include: MIN MAX AVG, HOLD, REL,

PEAK±, Range Lock, RS-232 IR communication, and Backlight.

MAKING MEASUREMENTS

Verify Instrument Operation

Before attempting to make a measurement, verify that

the instrument is operational and the battery is good. If

the instrument is not operational, have it repaired before

attempting to make a measurement.

Range Selection

In addition to autoranging the 38XR-A allows you to

manually select and lock a range by pressing the RANGE

button. RANGE appears on the display to indicate that

manual ranging is active and the range is locked. When

appropriate, each subsequent press of the range button steps

the meter to the next higher range. When the highest range

is reached the next press returns the meter to the lowest

range. To return to autoranging press and hold the RANGE

button for 2 seconds. If RANGE still shows on the display,

autoranging is not appropriate for the selected function.

Use autorange for all initial measurements. Then, when

appropriate, use the RANGE button to select and lock a range.

5

 WARNING

To avoid electrical shock while manual ranging use the

display annunciators to identify the actual range selected.

Correcting an Overload (0oor - 0o) Indication 

An 0oor - 0o indication may appear on the display to indicate

that an overload condition exists. For voltage and current

measurements, an overload should be immediately corrected

by selecting a higher range. If the highest range setting does

not eliminate the overload, interrupt the measurement until

the problem is identified and eliminated. The 0o indication

is normal for some functions; for example, resistance,

continuity, and diode test.

Measuring DC Voltage

1. Set the Function Switch to v.

2. If RANGE is displayed, press the RANGE button to

enable autoranging.

3. Connect the Test Leads: Red to E, Black to COM

4. Connect the Test Probes to the circuit test points.

5. Read the display, and, if necessary, correct any

overload (0o) conditions.

4

3

1

2

5

38XR-A

6

Measuring AC + DC Voltage (True rms)

See Additional Features to find out the advantages of true rms.

1. Set the Function Switch to v.

2. If DC is displayed, press the yellow button to turn on

AC+DC.

3. If RANGE is displayed, press the RANGE button to

enable autoranging.

4. Connect the Test Leads: Red to

E

, Black to COM

5. Connect the Test Probes to the circuit test points.

6. Read the display, and, if necessary, correct any

overload (0o) conditions.

Measuring AC Voltage (True rms)

See Additional Features to find out the advantages of true rms.

1. Set the Function Switch to V.

2. If dBm is displayed, press the yellow button to turn on AC.

3. If RANGE is displayed, press the RANGE button to

enable autoranging.

4. Connect the Test Leads: Red to E, Black to COM

5. Connect the Test Probes to the circuit test points.

6. Read the display, and, if necessary, correct any

overload (0o) conditions.

5

3

2

6

4

1

38XR-A

7

Input Waveform

Signal d’entrée

Eingangsschwingungsform

Forma d’onda d’ingresso

Forma de onda de entrada

38XR-A

Ture rms *

AC

AC + DC

Sine Wave

Sinusoïdale

Sinusschwingung

Onda sinusoidale

Onda sinusoidal

0.707 x V

peak

CF = 1.414

0.707 x V

peak

CF = 1.414

Full Wave, Sine Wave

Onde complète,

Sinusoïdale

Volle Schwingung,

Sinusschwingung

Onda sinusoidale, onda

intera

Onda completa, Onda

sinusoidal

0.308 x V

peak

CF = 3.247

0.707 x V

peak

CF = 1.414

Half-Wave, Sine Wave

Demi-onde, sinusoïdale

Halbschwingung,

Sinusschwingung

Onda sinusoidale,

semionda

Media onda, onda

sinusoidal

0.386 x V

peak

CF = 2.591

0.500 x V

peak

CF = 2.000

Square Wave

Onde carrée

Rechteckschwingung

Onda quadra

Onda cuadrada

1.000 x V

peak

CF = 1.000

1.000 x V

peak

CF = 1.000

Square Wave

Onde carrée

Rechteckschwingung

Onda quadra

Onda cuadrada

0.500 x V

peak

CF = 2.000

0.707 x V

peak

CF = 1.414

Pulse Wave

Onde impulsionnelle

Impulsschwingung

Onda dell’impulso

Onda de impulsos

V

peak

x K

CF = 1 / K

V

peak

x

CF =

V

peak

/

Sawtooth Wave

Onde en dent de scie

Sägezahnschwingung

Onda a denti di sega

Onda diente de sierra

0.577 x V

peak

CF = 1.733

0.577 x V

peak

CF = 1.733

* CF = Crest Factor, Crest Factor = V

peak

/ V

rms

8

Preparing for Current Measurements

• Turn off circuit power before connecting the Test Probes.

• Allow the meter to cool between measurements, if

current measurements approach or exceeds 10 amps.

• A warning tone sounds if you connect a test lead to a

current input while a current function is not selected.

• Open circuit voltage at the measurement point must

not exceed 1000 V.

• Always measure current in series with the load. Never

measure current across a voltage source.

Measuring DC Current

1. Set the Function Switch to a current function, μA, mA, or 10A.

2. If

AC

or

AC+DC

is displayed, press the yellow button to

turn on

DC

.

3. If the

μA

function is selected and

RANGE

is displayed,

press the

RANGE

button to enable autoranging.

4. Connect the Test Leads: Red to

mA

or

10A

, Black to

COM

.

5. Turn off power to the circuit being measured.

6. Open the test circuit (X) to establish measurement

points.

7. Connect the Test Probes in series with the load (to the

measurement points).

8. Turn on power to the circuit being measured.

9. Read the display, and, if necessary, correct any

overload (0oor - 0o) conditions.

5

8

6

7

1

4

3

9

38XR-A

2

9

Measuring AC or AC+DC Current (True rms)

See Additional Features to find out the advantages of true rms.

1. Set the Function Switch to a current function and

range, μA, mA, or 10A.

2. If DC is displayed, press the yellow button to turn on

AC or AC+DC.

3. If the μA or mA function is selected and RANGE is

displayed, press the RANGE button to enable autoranging.

4. Connect the Test Leads: Red to mA or 10A, Black to COM

5. Turn off power to the circuit being measured.

6. Open the test circuit (X) to establish measurement

points.

7. Connect the Test Probes in series with the load (to the

measurement points).

8. Turn on power to the circuit being measured.

9. Read the display, and, if necessary, correct any

overload (0o) conditions.

5

8

6

7

1

4

2

3

9

38XR-A

10

Input Waveform

Signal d’entrée

Eingangsschwingungsform

Forma d’onda d’ingresso

Forma de onda de entrada

38XR-A

Ture rms *

AC

AC + DC

Sine Wave

Sinusoïdale

Sinusschwingung

Onda sinusoidale

Onda sinusoidal

0.707 x V

peak

CF = 1.414

0.707 x V

peak

CF = 1.414

Full Wave, Sine Wave

Onde complète,

Sinusoïdale

Volle Schwingung,

Sinusschwingung

Onda sinusoidale, onda

intera

Onda completa, Onda

sinusoidal

0.308 x V

peak

CF = 3.247

0.707 x V

peak

CF = 1.414

Half-Wave, Sine Wave

Demi-onde, sinusoïdale

Halbschwingung,

Sinusschwingung

Onda sinusoidale,

semionda

Media onda, onda

sinusoidal

0.386 x V

peak

CF = 2.591

0.500 x V

peak

CF = 2.000

Square Wave

Onde carrée

Rechteckschwingung

Onda quadra

Onda cuadrada

1.000 x V

peak

CF = 1.000

1.000 x V

peak

CF = 1.000

Square Wave

Onde carrée

Rechteckschwingung

Onda quadra

Onda cuadrada

0.500 x V

peak

CF = 2.000

0.707 x V

peak

CF = 1.414

Pulse Wave

Onde impulsionnelle

Impulsschwingung

Onda dell’impulso

Onda de impulsos

V

peak

x K

CF = 1 / K

V

peak

x

CF =

V

peak

/

Sawtooth Wave

Onde en dent de scie

Sägezahnschwingung

Onda a denti di sega

Onda diente de sierra

0.577 x V

peak

CF = 1.733

0.577 x V

peak

CF = 1.733

* CF = Crest Factor, Crest Factor = V

peak

/ V

rms

11

Measuring Resistance

1. Set the Function Switch to Ω.

2. If  is displayed, press the yellow button to display Ω.

3. If RANGE is displayed, press the RANGE button to enable

autoranging.

4. Connect the Test Leads: Red to E, Black to COM

5. Turn off power to the circuit being measured. Never

measure resistance across a voltage source or on a

powered circuit.

6. Discharge any capacitors that may influence the reading.

7. Connect the Test Probes across the resistance.

8. Read the display. If 0o appears on the highest range, the

resistance is too large to be measured.

5

7

6

4

1

2

3

8

38XR-A

Testing for Continuity

1. Set the Function Switch to .

2. If Ω is displayed, press the yellow button to display .

3. Connect the Test Leads: Red to E, Black to COM

4. Turn off power to the circuit being measured.

5. Discharge any capacitors that may influence the reading.

6. Connect the Test Probes across the resistance.

7. Listen for the tone that indicates continuity (< 40 Ω).

12

6

4

5

7

3

1

2

38XR-A

Testing Diodes

1. Set the Function Switch to

d

.

2. Connect the Test Leads: Red to E, Black to COM

3. Turn off power to the circuit being measured.

4. Free at least one end of the diode from the circuit.

5. Connect the Test Probes across the diode.

6. Read the display. A good diode has a forward voltage drop

of about 0.6 V. An open or reverse biased diode will read 0o.

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38XR-A

13

Measuring Capacitance

1. Set the Function Switch to the P function.

2. If RANGE is displayed, press the RANGE button to enable

autoranging.

3. Connect the Test Leads: Red to COM, Black to h

4. Turn off power to the circuit being measured.

5. Discharge the capacitor using a 100 kΩ resistor.

6. Free at least one end of the capacitor from the circuit.

7. Connect the Test Probes across the capacitor. When

measuring an electrolytic capacitor match the test lead

polarity to the polarity of the capacitor.

8. Read the display.

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6

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3

4

8

2

38XR-A

Measuring Temperature

1. Set the function Switch to °C or °F.

2. Connect the K-type thermocouple to a TEMP adapter

(XR-TA). Match the polarity of the adapter to the polarity

of the thermocouple.

3. Connect the TEMP adapter to the E and COM inputs.

Note: The 38XR-A is compatible with all K-type

thermocouples. The K-type bead thermocouple supplied

with the meter is not intended for contact with liquids or

electrical circuits.

14

4. Expose the thermocouple to the temperature to be measured.

5. Read the display.

2

4

K

3

1

5

38XR-A

Measuring Frequency

1. Set the Function Switch to Hz.

2. If % is displayed, press the yellow button to display Hz.

3. If RANGE is displayed, press the RANGE button to enable

autoranging.

4. Connect the Test Leads: Red to Hz, Black to COM.

5. Connect the Test Probes to the signal source.

6. Read the display.

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4

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38XR-A

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